// Copyright 2020 JanusGraph Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package org.janusgraph.core;

import org.janusgraph.graphdb.query.profile.ProfileObservable;

/**
 * @author Boxuan Li (liboxuan@connect.hku.hk)
 */
public interface MixedIndexCountQuery extends ProfileObservable {

    /**
     * Fire a count query against index backend to retrieve total number of satisfying elements
     *
     * @return total elements that match the query
     */
    Long executeTotals();
}
